The author served with the U.S. 6th Cavalry in the west after the civil war. Published in 1889, these are sketches of his life in the U.S. Army on the Texas frontier. His tales and reminescenses provide a clear and detailed look at the life and times of a soldier serving during the time of Reconstruction and the Indian Wars.
Five Years a Cavalryman is part memoir and part travelogue, and it's an intelligently-written and sometimes wryly humorous account of the author's days in Texas. He provides plenty of color and detail, and gives the best description of army life on the frontier that I've ever come across. Just to cite one peculiarity among many, the Indians sold firewater to the enlisted men, not the other way around.
The author served three years during the American Civil War. After the war he enlisted in the United States cavalry and was transferred to the Texas frontier where he served five years. These are his memoirs of that frontier service.